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Try again to teach getFirstTerminator() about debug values.

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Fix some callers to better deal with debug values.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123419 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2011-01-14 01:17:53 +00:00
parent c5f608b49c
commit 09befe9036
2 changed files with 24 additions and 7 deletions
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21
lib/CodeGen/MachineBasicBlock.cpp
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@@ -155,11 +155,22 @@ MachineBasicBlock::SkipPHIsAndLabels(MachineBasicBlock::iterator I) {
}
MachineBasicBlock::iterator MachineBasicBlock::getFirstTerminator() {
iterator I = end();
while (I != begin() && (--I)->getDesc().isTerminator())
; /*noop */
if (I != end() && !I->getDesc().isTerminator()) ++I;
return I;
iterator B = begin(), I = end();
iterator Term = I;
while (I != B) {
--I;
// Ignore any debug values after the first terminator.
if (I->isDebugValue())
continue;
// Stop once we see a non-debug non-terminator.
if (!I->getDesc().isTerminator())
break;
// Earliest terminator so far.
Term = I;
}
// Return the first terminator, or end().
// Everything after Term is terminators and debug values.
return Term;
}
MachineBasicBlock::iterator MachineBasicBlock::getLastNonDebugInstr() {